autoconf/acgeneral.m4

dnl Parameterized macros that do not check for something specific.
dnl This file is part of Autoconf.
dnl Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
dnl
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2, or (at your option)
dnl any later version.
dnl
dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with this program; if not, write to the Free Software
dnl Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
dnl
dnl Written by David MacKenzie, with help from
dnl Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
dnl Roland McGrath, Noah Friedman, and david d zuhn.
dnl
changequote([,])dnl
undefine([eval])dnl
undefine([include])dnl
undefine([shift])dnl
undefine([format])dnl
dnl
ifdef([__gnu__], , [errprint(Autoconf requires GNU m4
)m4exit(2)])dnl
dnl
dnl
dnl Utility functions for stamping the configure script.
dnl
dnl
define(AC_ACVERSION, 1.7.10)dnl
dnl This is defined by the --version option of the autoconf script.
ifdef([AC_PRINT_VERSION], [errprint(Autoconf version AC_ACVERSION
)])dnl
dnl
dnl These are currently not used, for the sake of people who diff
dnl configure scripts and don't want spurious differences.
dnl But they are too clever to just delete.
dnl
define(AC_USER, [esyscmd(
changequote({,})dnl
# Extract the user name from the first pair of parentheses.
({ac_sedcmd='s/[^(]*(\([^)]*\)).*/\1/';}
changequote([,])dnl
whoami || id|sed "$ac_sedcmd") 2>/dev/null|tr -d '\012')])dnl
dnl
define(AC_HOST, [esyscmd((hostname || uname -n) 2>/dev/null|tr -d '\012')])dnl
dnl
define(AC_DATE, [esyscmd(date|tr -d '\012')])dnl
dnl
dnl
dnl Controlling Autoconf operation
dnl
dnl
dnl This is separate from AC_INIT to prevent GNU m4 1.0 from coredumping
dnl when AC_CONFIG_HEADER is used.
define(AC_NOTICE,
[# Guess values for system-dependent variables and create Makefiles.
dnl [#] Generated automatically using autoconf.
# Generated automatically using autoconf version] AC_ACVERSION [
dnl [#] by AC_USER@AC_HOST on AC_DATE
# Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.

# This configure script is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as published
# by the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This script is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
# Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
])dnl
dnl
define(AC_PARSEARGS,
[# Save the original args to write them into config.status later.
ac_configure_args="[$]*"

# Only options that might do something get documented.
changequote(,)dnl
ac_usage="Usage: configure [options] [host]
Options: [defaults in brackets]
--disable-FEATURE	do not include FEATURE (same as --enable-FEATURE=no)
--enable-FEATURE[=ARG]	include FEATURE [ARG=yes]
--exec-prefix=PREFIX	install host dependent files in PREFIX [/usr/local]
--help			print this message
--prefix=PREFIX		install host independent files in PREFIX [/usr/local]
--quiet, --silent	do not print \`checking for...' messages
--srcdir=DIR		find the sources in DIR [configure dir or ..]
--verbose		print results of checks
--version		print the version of autoconf that created configure
--with-PACKAGE[=ARG]	use PACKAGE [ARG=yes]
--without-PACKAGE	do not use PACKAGE (same as --with-PACKAGE=no)"
changequote([,])dnl

# Initialize some variables set by options.
build=NONE
exec_prefix=
host=NONE
nonopt=NONE
norecursion=
prefix=
program_prefix=
program_suffix=
program_transform_name=
ac_silent=
site=
srcdir=
target=NONE
ac_verbose=

ac_prev=
for ac_option
do

  # If the previous option needs an argument, assign it.
  if test -n "$ac_prev"; then
    eval "$ac_prev=\$ac_option"
    ac_prev=
    continue
  fi

  # Accept (but ignore some of) the most important Cygnus configure
  # options, so we can diagnose typos.

  case "$ac_option" in
changequote(,)dnl
  -*=*) ac_optarg=`echo "$ac_option" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
changequote([,])dnl
  *) ac_optarg= ;;
  esac

  case "$ac_option" in

  -build | --build | --buil | --bui | --bu | --b)
    ac_prev=build ;;
  -build=* | --build=* | --buil=* | --bui=* | --bu=* | --b=*)
    build="$ac_optarg" ;;

  -disable-* | --disable-*)
    ac_feature=`echo $ac_option|sed -e 's/-*disable-//'`
    # Reject names that aren't valid shell variable names.
changequote(,)dnl
    if test -n "`echo $ac_feature| sed 's/[-a-zA-Z0-9_]//g'`"; then
changequote([,])dnl
      AC_ERROR($ac_feature: invalid feature name)
    fi
    ac_feature=`echo $ac_feature| sed 's/-/_/g'`
    eval "enable_${ac_feature}=no" ;;

  -enable-* | --enable-*)
    ac_feature=`echo $ac_option|sed -e 's/-*enable-//' -e 's/=.*//'`
    # Reject names that aren't valid shell variable names.
changequote(,)dnl
    if test -n "`echo $ac_feature| sed 's/[-_a-zA-Z0-9]//g'`"; then
changequote([,])dnl
      AC_ERROR($ac_feature: invalid feature name)
    fi
    ac_feature=`echo $ac_feature| sed 's/-/_/g'`
    case "$ac_option" in
      *=*) ;;
      *) ac_optarg=yes ;;
    esac
    eval "enable_${ac_feature}='$ac_optarg'" ;;

  # For backward compatibility, recognize -exec-prefix and --exec_prefix.
  -exec-prefix | --exec_prefix | --exec-prefix | --exec-prefi \
  | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- \
  | --exec | --exe | --ex)
    ac_prev=exec_prefix ;;
  -exec-prefix=* | --exec_prefix=* | --exec-prefix=* | --exec-prefi=* \
  | --exec-pref=* | --exec-pre=* | --exec-pr=* | --exec-p=* | --exec-=* \
  | --exec=* | --exe=* | --ex=*)
    exec_prefix="$ac_optarg" ;;

  -gas | --gas | --ga | --g) with_gas=1 ;; # Obsolete; use --with-gas.

  -help | --help | --hel | --he)
    cat << EOF
$ac_usage
EOF
    exit 0 ;;

  -host | --host | --hos | --ho)
    ac_prev=host ;;
  -host=* | --host=* | --hos=* | --ho=*)
    host="$ac_optarg" ;;

  -nfp | --nfp | --nf) with_fp=no ;; # Obsolete; use --without-fp.

  -norecursion | --norecursion | --norecursio | --norecursi \
  | --norecurs | --norecur | --norecu | --norec | --nore | --nor | --no)
  norecursion=yes ;;

  -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
    ac_prev=prefix ;;
  -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
    prefix="$ac_optarg" ;;

  -program-prefix | --program-prefix | --program-prefi | --program-pref \
  | --program-pre | --program-pr | --program-p)
    ac_prev=program_prefix ;;
  -program-prefix=* | --program-prefix=* | --program-prefi=* \
  | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*)
    program_prefix="$ac_optarg" ;;

  -program-suffix | --program-suffix | --program-suffi | --program-suff \
  | --program-suf | --program-su | --program-s)
    ac_prev=program_suffix ;;
  -program-suffix=* | --program-suffix=* | --program-suffi=* \
  | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*)
    program_suffix="$ac_optarg" ;;

  -program-transform-name | --program-transform-name \
  | --program-transform-nam | --program-transform-na \
  | --program-transform-n | --program-transform- \
  | --program-transform | --program-transfor \
  | --program-transfo | --program-transf \
  | --program-trans | --program-tran \
  | --progr-tra | --program-tr | --program-t)
    ac_prev=program_transform_name ;;
  -program-transform-name=* | --program-transform-name=* \
  | --program-transform-nam=* | --program-transform-na=* \
  | --program-transform-n=* | --program-transform-=* \
  | --program-transform=* | --program-transfor=* \
  | --program-transfo=* | --program-transf=* \
  | --program-trans=* | --program-tran=* \
  | --progr-tra=* | --program-tr=* | --program-t=*)
    program_transform_name="$ac_optarg" ;;

  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
  | -silent | --silent | --silen | --sile | --sil)
    ac_silent=yes ;;

  -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
    ac_prev=srcdir ;;
  -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
    srcdir="$ac_optarg" ;;

  -target | --target | --targe | --targ | --tar | --ta | --t)
    ac_prev=target ;;
  -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
    target="$ac_optarg" ;;

  -v | -verbose | --verbose | --verbos | --verbo | --verb)
      ac_verbose=yes ;;

  -version | --version | --versio | --versi | --vers)
    echo "configure generated by autoconf version AC_ACVERSION"
    exit 0 ;;

  -with-* | --with-*)
    ac_package=`echo $ac_option|sed -e 's/-*with-//' -e 's/=.*//'`
    # Reject names that aren't valid shell variable names.
changequote(,)dnl
    if test -n "`echo $ac_package| sed 's/[-_a-zA-Z0-9]//g'`"; then
changequote([,])dnl
      AC_ERROR($ac_package: invalid package name)
    fi
    ac_package=`echo $ac_package| sed 's/-/_/g'`
    case "$ac_option" in
      *=*) ;;
      *) ac_optarg=yes ;;
    esac
    eval "with_${ac_package}='$ac_optarg'" ;;

  -without-* | --without-*)
    ac_package=`echo $ac_option|sed -e 's/-*without-//'`
    # Reject names that aren't valid shell variable names.
changequote(,)dnl
    if test -n "`echo $ac_package| sed 's/[-a-zA-Z0-9_]//g'`"; then
changequote([,])dnl
      AC_ERROR($ac_package: invalid package name)
    fi
    ac_package=`echo $ac_package| sed 's/-/_/g'`
    eval "with_${ac_package}=no" ;;

  --x) with_x=1 ;; # Obsolete; use --with-x.

  -*) AC_WARN([$ac_option: invalid option; use --help to show usage])
    ;;

  *) 
changequote(,)dnl
    if test -n "`echo $ac_option| sed 's/[-a-z0-9]//g'`"; then
changequote([,])dnl
      AC_WARN($ac_option: invalid host type)
    fi
    if test "x$nonopt" -ne xNONE; then
      AC_ERROR(can only configure for one host and one target at a time)
    fi
    nonopt="$ac_option"
    ;;

  esac
done

if test -n "$ac_prev"; then
  AC_ERROR(missing argument to --`echo $ac_prev | sed 's/_/-/g'`)
fi
])dnl
dnl
define(AC_INIT,
[#!/bin/sh
AC_NOTICE
AC_PARSEARGS
AC_PREPARE($1)
AC_LANG_C])dnl
dnl
define(AC_PREPARE,
[trap 'rm -fr conftest* confdefs* core $ac_clean_files; exit 1' 1 2 15
trap 'rm -fr confdefs* $ac_clean_files' 0

# Save the original args if we used an alternate arg parser.
ac_configure_args="${ac_configure_args-[$]*}"

# NLS nuisances.
# These must not be set unconditionally because not all systems understand
# e.g. LANG=C (notably SCO).
if test "${LC_ALL+set}" = 'set'; then LC_ALL=C; export LC_ALL; fi
if test "${LANG+set}"   = 'set'; then LANG=C;   export LANG;   fi

# confdefs.h avoids OS command line length limits that DEFS can exceed.
rm -rf conftest* confdefs.h
# AIX cpp loses on an empty file, so make sure it contains at least a newline.
echo > confdefs.h

# A filename unique to this package, relative to the directory that
# configure is in, which we can look for to find out if srcdir is correct.
ac_unique_file=$1

# Find the source files, if location was not specified.
if test -z "$srcdir"; then
  ac_srcdir_defaulted=yes
  # Try the directory containing this script, then `..'.
  ac_prog=[$]0
changequote(,)dnl
  ac_confdir=`echo $ac_prog|sed 's%/[^/][^/]*$%%'`
changequote([,])dnl
  test "x$ac_confdir" = "x$ac_prog" && ac_confdir=.
  srcdir=$ac_confdir
  if test ! -r $srcdir/$ac_unique_file; then
    srcdir=..
  fi
fi
if test ! -r $srcdir/$ac_unique_file; then
  if test x$ac_srcdir_defaulted = xyes; then
    AC_ERROR(can not find sources in ${ac_confdir} or ..)
  else
    AC_ERROR(can not find sources in ${srcdir})
  fi
fi
])dnl
dnl
define(AC_ENABLE,
[[#] check whether --enable-$1 was given
enableval="[$enable_]patsubst($1,-,_)"
if test -n "$enableval"; then
  ifelse([$2], , :, [$2])
ifelse([$3], , , [else
  $3
])dnl
fi
])dnl
dnl
dnl Giving --with an argument is deprecated.
define(AC_WITH,
[[#] check whether --with-$1 or --without-$1 was given.
withval="[$with_]patsubst($1,-,_)"
if test -n "$withval"; then
  ifelse([$2], , :, [$2])
ifelse([$3], , , [else
  $3
])dnl
fi
])dnl
dnl
dnl Guess the value for the `prefix' variable by looking for
dnl the argument program along PATH and taking its parent.
dnl Example: if the argument is `gcc' and we find /usr/local/gnu/bin/gcc,
dnl set `prefix' to /usr/local/gnu.
define(AC_PREFIX,
[if test -z "$prefix"
then
  AC_CHECKING([for $1 to derive installation directory prefix])
  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="$IFS:"
  for ac_dir in $PATH; do
    test -z "$ac_dir" && ac_dir=.
    if test $ac_dir != . && test -f $ac_dir/$1; then
changequote(,)dnl
      # Not all systems have dirname.
      prefix=`echo $ac_dir|sed 's%/[^/][^/]*$%%'`
changequote([,])dnl
      break
    fi
  done
  IFS="$ac_save_ifs"
  AC_VERBOSE(chose installation directory prefix ${prefix})
fi
])dnl
dnl
define(AC_CONFIG_HEADER, [define(AC_CONFIG_NAMES, $1)])dnl
dnl
define(AC_DOREV, [#!/bin/sh
# From configure.in $1
])dnl
define(AC_REVISION, [AC_DOREV(translit($1,$"))])dnl
dnl
dnl Subroutines of AC_PREREQ.
dnl
dnl Change the dots in version number $1 into commas.
define(AC_PREREQ_SPLIT, [translit($1,.,[,])])dnl
dnl
dnl Default the ternary version number to 0 (e.g., 1,7 -> 1,7,0).
define(AC_PREREQ_CANON, [$1,$2,ifelse([$3],,0,[$3])])dnl
dnl
dnl Complain and exit if the version number in $1 through $3 is less than
dnl the version number in $4 through $6.
dnl $7 is the printable version of the second version number.
define(AC_PREREQ_COMPARE,
[ifelse(builtin([eval],
[$3 + $2 * 100 + $1 * 10000 < $6 + $5 * 100 + $4 * 10000]),1,
[errprint(Autoconf version $7 or higher is required
)m4exit(3)])])dnl
dnl
dnl Complain and exit if the Autoconf version is less than $1.
define(AC_PREREQ,
[AC_PREREQ_COMPARE(AC_PREREQ_CANON(AC_PREREQ_SPLIT(AC_ACVERSION)),
AC_PREREQ_CANON(AC_PREREQ_SPLIT([$1])),[$1])])dnl
dnl
dnl
dnl Setting variables
dnl
dnl
dnl Several simple subroutines to do various flavors of quoting.
dnl
dnl Quote $1 against shell "s.
define(AC_QUOTE_DQUOTE, [dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
patsubst($1, changequote(,)\([$"`\\]\)changequote([,]), \\\1)])dnl
dnl
dnl Quote $1 against shell 's.
define(AC_QUOTE_SQUOTE, [patsubst($1, ', '\\'')])dnl
dnl
dnl Quote $1 against shell here documents (<<EOF).
define(AC_QUOTE_HERE, [changequote({,})dnl
dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
patsubst(patsubst($1, \(\\[$`\\]\), \\\1), \([$`]\), \\\1){}dnl
changequote([,])])dnl
dnl
dnl Quote $1 against the right hand side of a sed substitution.
define(AC_QUOTE_SED, [changequote({,})dnl
dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
dnl % and @ and ! are commonly used as the sed s separator character.
patsubst($1, \([&\\%@!]\), \\\1){}dnl
changequote([,])])dnl
dnl
dnl Quote $1 against tokenization.
define(AC_QUOTE_TOKEN, [changequote({,})dnl
patsubst($1, \([	 ]\), \\\1){}dnl
changequote([,])])dnl
dnl
dnl Subroutines of AC_DEFINE.  Does more quoting magic than any sane person
dnl should be able to understand.  The point of it all is that what goes into
dnl Makefile et al should be verbatim what was written in configure.in.
define(AC_DEFINE_QUOTE, [dnl
AC_QUOTE_TOKEN(AC_QUOTE_SQUOTE(AC_QUOTE_DQUOTE($1)))])dnl
dnl
define(AC_DEFINE_SEDQUOTE, [dnl
AC_QUOTE_DQUOTE(AC_QUOTE_HERE(AC_QUOTE_HERE(AC_QUOTE_SED($1))))])dnl
dnl
dnl Don't compare $2 to a blank, so we can support "-Dfoo=".
dnl If creating a configuration header file, we add
dnl commands to ac_sed_defs to define the variable.  ac_[due][ABCD]
dnl get defined in config.status.  Here we just insert the
dnl variable parts of the string: the variable name to define
dnl and the value to give it.
dnl The newlines around the curly braces prevent sh syntax errors.
define(AC_DEFINE,[
{
dnl Uniformly use AC_DEFINE_[SED]QUOTE, so callers of AC_DEFINE_UNQUOTED
dnl can use AC_QUOTE_* manually if they want to.
test -n "$ac_verbose" && \
ifelse($#, 2,
[define([AC_VAL], $2)dnl
echo "	defining" $1 to be ifelse(AC_VAL,, empty, "AC_QUOTE_SQUOTE(AC_VAL)")],
[define([AC_VAL], 1)dnl
echo "	defining $1"])
dnl
echo "[#][define]" $1 "AC_QUOTE_SQUOTE(AC_VAL)" >> confdefs.h
dnl Define DEFS even if AC_CONFIG_NAMES for use in user case statements.
DEFS="$DEFS -D$1=AC_QUOTE_SQUOTE(AC_VAL)"
ifdef([AC_CONFIG_NAMES],
ac_sed_defs="dnl
${ac_sed_defs}\${ac_dA}$1\${ac_dB}$1\${ac_dC}AC_DEFINE_SEDQUOTE(AC_VAL)\${ac_dD}
\${ac_uA}$1\${ac_uB}$1\${ac_uC}AC_DEFINE_SEDQUOTE(AC_VAL)\${ac_uD}
\${ac_eA}$1\${ac_eB}$1\${ac_eC}AC_DEFINE_SEDQUOTE(AC_VAL)\${ac_eD}
"
)dnl
}
])dnl
dnl
dnl Unsafe version of AC_DEFINE.
dnl Users are responsible for the quoting nightmare.
dnl Well, not all of it.  We need to pull the identify function out to
dnl the top level, because m4 doesn't really support nested functions;
dnl it doesn't distinguish between the arguments to the outer
dnl function, which should be expanded, and the arguments to the inner
dnl function, which shouldn't yet.
define(AC_IDENTITY,$1)dnl
define(AC_DEFINE_UNQUOTED,[dnl
pushdef([AC_QUOTE_SQUOTE],defn([AC_IDENTITY]))dnl
pushdef([AC_DEFINE_SEDQUOTE],defn([AC_IDENTITY]))dnl
AC_DEFINE($1,$2)dnl
popdef([AC_DEFINE_SEDQUOTE])dnl
popdef([AC_QUOTE_SQUOTE])dnl
])dnl
dnl
dnl Protects the argument from being diverted twice
dnl if this macro is called twice for it.
dnl Diversion 0 is the normal output.
dnl Diversion 1 is sed substitutions for output files.
dnl Diversion 2 is variable assignments for config.status.
define(AC_SUBST,
[ifdef([AC_SUBST_$1], ,
[define([AC_SUBST_$1], )dnl
divert(1)dnl
s%@$1@%[$]$1%g
divert(2)dnl
$1='[$]$1'
divert(0)dnl
])])dnl
dnl
dnl
dnl Printing messages
dnl
dnl
define(AC_CHECKING,
[test -n "$ac_silent" || echo "checking $1"])dnl
dnl
define(AC_VERBOSE,
[test -n "$ac_verbose" && echo "	$1"])dnl
dnl
define(AC_WARN,
[echo "configure: warning: $1" >&2])dnl
dnl
define(AC_ERROR,
[echo "configure: $1" >&2; exit 1])dnl
dnl
dnl
dnl Selecting which language to use for testing
dnl
dnl
define(AC_LANG_C,
[define([AC_LANG],[C])AC_PROVIDE([$0])ac_ext=c
ac_cpp='${CPP} $CFLAGS'
ac_compile='${CC-cc} $CFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS >/dev/null 2>&1'
])dnl
dnl
define(AC_LANG_CPLUSPLUS,
[define([AC_LANG],[CPLUSPLUS])AC_PROVIDE([$0])ac_ext=C
ac_cpp='${CXXCPP} $CXXFLAGS'
ac_compile='${CXX-gcc} $CXXFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS >/dev/null 2>&1'
])dnl
dnl
dnl Push the current language on a stack.
define(AC_LANG_SAVE, [pushdef([AC_LANG_STACK], AC_LANG)])dnl
dnl
dnl Restore the current language from the stack.
define(AC_LANG_RESTORE,
[ifelse(AC_LANG_STACK,C,[ifelse(AC_LANG,C,,[AC_LANG_C])],[ifelse(AC_LANG,CPLUSPLUS,,[AC_LANG_CPLUSPLUS])])[]popdef([AC_LANG_STACK])])dnl
dnl
dnl
dnl Enforcing ordering constraints
dnl
dnl
define(AC_BEFORE,
[ifdef([AC_PROVIDE_$2], [errprint(__file__:__line__: [$2 was called before $1
])])])dnl
dnl
define(AC_REQUIRE,
[ifdef([AC_PROVIDE_$1],,[indir([$1])
])])dnl
dnl
define(AC_PROVIDE,
[define([AC_PROVIDE_$1],)])dnl
dnl
define(AC_OBSOLETE,
[errprint(__file__:__line__: warning: [$1] is obsolete[$2]
)])dnl
dnl
dnl
dnl Checking for kinds of features
dnl
dnl
define(AC_PROGRAM_CHECK,
[if test -z "[$]$1"; then
  # Extract the first word of `$2', so it can be a program name with args.
  set ac_dummy $2; ac_word=[$]2
  AC_CHECKING([for $ac_word])
  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
  for ac_dir in $PATH; do
    test -z "$ac_dir" && ac_dir=.
    if test -f $ac_dir/$ac_word; then
      $1="$3"
      break
    fi
  done
  IFS="$ac_save_ifs"
fi
ifelse([$4],,, [test -z "[$]$1" && $1="$4"])
test -n "[$]$1" && AC_VERBOSE(setting $1 to [$]$1)
AC_SUBST($1)dnl
])dnl
dnl
define(AC_PROGRAMS_CHECK,
[for ac_prog in $2
do
AC_PROGRAM_CHECK($1, [$]ac_prog, [$]ac_prog, )
test -n "[$]$1" && break
done
ifelse([$3],,, [test -n "[$]$1" || $1="$3"
])])dnl
dnl
define(AC_PROGRAM_PATH,
[if test -z "[$]$1"; then
  # Extract the first word of `$2', so it can be a program name with args.
  set ac_dummy $2; ac_word=[$]2
  AC_CHECKING([for $ac_word])
  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
  for ac_dir in $PATH; do
    test -z "$ac_dir" && ac_dir=.
    if test -f $ac_dir/$ac_word; then
      $1="$ac_dir/$ac_word"
      break
    fi
  done
  IFS="$ac_save_ifs"
fi
ifelse([$3],,, [test -z "[$]$1" && $1="$3"])
test -n "[$]$1" && AC_VERBOSE(setting $1 to [$]$1)
AC_SUBST($1)dnl
])dnl
define(AC_PROGRAMS_PATH,
[for ac_prog in $2
do
AC_PROGRAM_PATH($1, [$]ac_prog)
test -n "[$]$1" && break
done
ifelse([$3],,, [test -n "[$]$1" || $1="$3"
])])dnl
define(AC_HEADER_EGREP,
[AC_REQUIRE_CPP()AC_PROVIDE([$0])echo '#include "confdefs.h"
#include <$2>' > conftest.${ac_ext}
eval "$ac_cpp conftest.${ac_ext} > conftest.out 2>&1"
if egrep "$1" conftest.out >/dev/null 2>&1; then
  ifelse([$3], , :, [rm -rf conftest*
  $3
])
ifelse([$4], , , [else
  rm -rf conftest*
  $4
])dnl
fi
rm -f conftest*
])dnl
dnl
dnl Because this macro is used by AC_GCC_TRADITIONAL, which must come early,
dnl it is not included in AC_BEFORE checks.
define(AC_PROGRAM_EGREP,
[AC_REQUIRE_CPP()AC_PROVIDE([$0])cat > conftest.${ac_ext} <<EOF
#include "confdefs.h"
[$2]
EOF
eval "$ac_cpp conftest.${ac_ext} > conftest.out 2>&1"
if egrep "$1" conftest.out >/dev/null 2>&1; then
  ifelse([$3], , :, [rm -rf conftest*
  $3
])
ifelse([$4], , , [else
  rm -rf conftest*
  $4
])dnl
fi
rm -f conftest*
])dnl
dnl
define(AC_HEADER_CHECK,
[AC_CHECKING([for $1])
ifelse([$3], , [AC_TEST_CPP([#include <$1>], [$2])],
[AC_TEST_CPP([#include <$1>], [$2], [$3])])
])dnl
dnl
define(AC_COMPILE_CHECK,
[AC_PROVIDE([$0])dnl
ifelse([$1], , , [AC_CHECKING([for $1])]
)dnl
dnl We use return because because C++ requires a prototype for exit.
cat > conftest.${ac_ext} <<EOF
#include "confdefs.h"
[$2]
int main() { return 0; }
int t() { [$3]; return 0; }
EOF
dnl Don't try to run the program, which would prevent cross-configuring.
if eval $ac_compile; then
  ifelse([$4], , :, [rm -rf conftest*
  $4
])
ifelse([$5], , , [else
  rm -rf conftest*
  $5
])dnl
fi
rm -f conftest*]
)dnl
dnl
define(AC_TEST_PROGRAM,
[AC_PROVIDE([$0])ifelse([$4], , , [AC_REQUIRE([AC_CROSS_CHECK])if test -n "$cross_compiling"
then
  $4
else
])dnl
cat > conftest.${ac_ext} <<EOF
#include "confdefs.h"
[$1]
EOF
eval $ac_compile
if test -s conftest && (./conftest; exit) 2>/dev/null; then
  ifelse([$2], , :, [$2
])
ifelse([$3], , , [else
  $3
])dnl
fi
ifelse([$4], , , fi
)dnl
rm -fr conftest*])dnl
dnl
define(AC_TEST_CPP,
[AC_REQUIRE_CPP()dnl
cat > conftest.${ac_ext} <<EOF
#include "confdefs.h"
[$1]
EOF
dnl Some shells (Coherent) do redirections in the wrong order, so need
dnl the parens.
ac_err=`eval "($ac_cpp conftest.${ac_ext} >/dev/null) 2>&1"`
if test -z "$ac_err"; then
  ifelse([$2], , :, [rm -rf conftest*
  $2
])
ifelse([$3], , , [else
  rm -rf conftest*
  $3
])dnl
fi
rm -f conftest*])dnl
dnl
define(AC_REPLACE_FUNCS,
[for ac_func in $1
do
AC_COMPILE_CHECK([${ac_func}], [#include <ctype.h>], [
/* The GNU C library defines this for functions which it implements
    to always fail with ENOSYS.  Some functions are actually named
    something starting with __ and the normal name is an alias.  */
#if defined (__stub_${ac_func}) || defined (__stub___${ac_func})
choke me
#else
/* Override any gcc2 internal prototype to avoid an error.  */
extern char ${ac_func}(); ${ac_func}();
#endif
], , [LIBOBJS="$LIBOBJS ${ac_func}.o"
AC_VERBOSE(using ${ac_func}.o instead)])
done
AC_SUBST(LIBOBJS)dnl
])dnl
dnl
define(AC_FUNC_CHECK,
[ifelse([$3], , [AC_COMPILE_CHECK($1, [#include <ctype.h>], [
/* The GNU C library defines this for functions which it implements
    to always fail with ENOSYS.  Some functions are actually named
    something starting with __ and the normal name is an alias.  */
#if defined (__stub_$1) || defined (__stub___$1)
choke me
#else
/* Override any gcc2 internal prototype to avoid an error.  */
extern char $1(); $1();
#endif
],
$2)], [AC_COMPILE_CHECK($1, [#include <ctype.h>], [
/* The GNU C library defines this for functions which it implements
    to always fail with ENOSYS.  Some functions are actually named
    something starting with __ and the normal name is an alias.  */
#if defined (__stub_$1) || defined (__stub___$1)
choke me
#else
/* Override any gcc2 internal prototype to avoid an error.  */
extern char $1(); $1();
#endif
],
$2, $3)])dnl
])dnl
dnl
define(AC_HAVE_FUNCS,
[for ac_func in $1
do
changequote(,)dnl
ac_tr_func=HAVE_`echo $ac_func | tr '[a-z]' '[A-Z]'`
changequote([,])dnl
AC_FUNC_CHECK(${ac_func},
AC_DEFINE(${ac_tr_func}))dnl
done
])dnl
dnl
define(AC_HAVE_HEADERS,
[AC_REQUIRE_CPP()dnl Make sure the cpp check happens outside the loop.
for ac_hdr in $1
do
changequote(,)dnl
ac_tr_hdr=HAVE_`echo $ac_hdr | tr '[a-z]./' '[A-Z]__'`
changequote([,])dnl
AC_HEADER_CHECK(${ac_hdr},
AC_DEFINE(${ac_tr_hdr}))dnl
done
])dnl
dnl
define(AC_HAVE_LIBRARY, [dnl
changequote(/,/)dnl
define(/libname/, dnl
patsubst(patsubst($1, /lib\([^\.]*\)\.a/, /\1/), /-l/, //))dnl
changequote([,])dnl
ac_save_LIBS="${LIBS}"
LIBS="${LIBS} -l[]libname[]"
ac_have_lib=""
AC_COMPILE_CHECK([-l[]libname[]], , [main();], [ac_have_lib="1"])dnl
LIBS="${ac_save_LIBS}"
ifelse($#, 1, [dnl
if test -n "${ac_have_lib}"; then
   AC_DEFINE([HAVE_LIB]translit(libname, [a-z], [A-Z]))
   LIBS="${LIBS} -l[]libname[]"
fi
undefine(libname)dnl
], [dnl
if test -n "${ac_have_lib}"; then
   :; $2
else
   :; $3
fi
])])dnl
dnl
define(AC_SIZEOF_TYPE,
[AC_CHECKING(size of $1)
$2=0
AC_TEST_PROGRAM([#include <stdio.h>
main()
{
  FILE *f=fopen("conftestval", "w");
  if (!f) exit(1);
  fprintf(f, "%d\n", sizeof($1));
  exit(0);
}], $2=`cat conftestval`)])dnl
dnl
dnl
dnl The big finish
dnl
dnl
define(AC_OUTPUT,
[changequote(,)dnl
# Set default prefixes.
if test -n "$prefix"; then
  test -z "$exec_prefix" && exec_prefix='${prefix}' # Let make expand it.
  ac_prsub="s%^prefix\\([ 	]*\\)=\\([ 	]*\\).*$%prefix\\1=\\2$prefix%"
fi
if test -n "$exec_prefix"; then
  ac_prsub="$ac_prsub
s%^exec_prefix\\([ 	]*\\)=\\([ 	]*\\).*$%exec_prefix\\1=\\2$exec_prefix%"
fi
# Any assignment to VPATH causes Sun make to only execute
# the first set of double-colon rules, so remove it if not needed.
# If there is a colon in the path, we need to keep it.
if test "x$srcdir" = x.; then
  ac_vpsub='/^[ 	]*VPATH[ 	]*=[^:]*$/d'
fi

# Quote sed substitution magic chars in DEFS.
cat >conftest.def <<EOF
$DEFS
EOF
ac_escape_ampersand_and_backslash='s%[&\\]%\\&%g'
DEFS=`sed "$ac_escape_ampersand_and_backslash" <conftest.def`
rm -f conftest.def
# Substitute for predefined variables.
changequote([,])dnl
AC_SUBST(LIBS)dnl
AC_SUBST(srcdir)dnl
AC_SUBST(prefix)dnl
AC_SUBST(exec_prefix)dnl
dnl Substituting for DEFS would confuse sed if it contains multiple lines.
ifdef([AC_CONFIG_NAMES],
[divert(1)dnl
s%@DEFS@%-DHAVE_CONFIG_H%],
[divert(1)dnl
s%@DEFS@%$DEFS%]
[divert(2)dnl
DEFS='$DEFS'
])dnl
divert(2)dnl
ac_prsub='$ac_prsub'
ac_vpsub='$ac_vpsub'
extrasub='$extrasub'
divert(0)dnl

trap 'rm -f config.status; exit 1' 1 2 15
echo creating config.status
rm -f config.status
cat > config.status <<EOF
#!/bin/sh
# Generated automatically by configure.
# Run this file to recreate the current configuration.
# This directory was configured as follows,
dnl hostname on some systems (SVR3.2, Linux) returns a bogus exit status,
dnl so uname gets run too.
# on host `(hostname || uname -n) 2>/dev/null | sed 1q`:
#
[#] [$]0 [$]ac_configure_args

changequote(,)dnl
ac_cs_usage="Usage: config.status [--recheck] [--version] [--help]"
changequote([,])dnl
for ac_option
do
  case "[\$]ac_option" in
  -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
    echo running [\$]{CONFIG_SHELL-/bin/sh} [$]0 [$]ac_configure_args
    exec [\$]{CONFIG_SHELL-/bin/sh} [$]0 [$]ac_configure_args ;;
  -version | --version | --versio | --versi | --vers | --ver | --ve | --v)
    echo "config.status generated by autoconf version AC_ACVERSION"
    exit 0 ;;
  -help | --help | --hel | --he | --h)
    echo "[\$]ac_cs_usage"; exit 0 ;;
  *) echo "[\$]ac_cs_usage"; exit 1 ;;
  esac
done

ifdef([AC_CONFIG_NAMES],
[trap 'rm -fr $1 AC_CONFIG_NAMES conftest*; exit 1' 1 2 15],
[trap 'rm -f $1; exit 1' 1 2 15])
dnl Insert the variable assignments.
undivert(2)dnl
EOF
cat >> config.status <<\EOF

ac_top_srcdir=$srcdir

CONFIG_FILES=${CONFIG_FILES-"$1"}
for ac_file in .. ${CONFIG_FILES}; do if test "x$ac_file" != x..; then
  # Remove last slash and all that follows it.  Not all systems have dirname.
changequote(,)dnl
  ac_dir=`echo $ac_file|sed 's%/[^/][^/]*$%%'`
changequote([,])dnl
  if test "$ac_dir" != "$ac_file"; then
    # The file is in a subdirectory.
    test ! -d "$ac_dir" && mkdir "$ac_dir"
    ac_dir_suffix="/$ac_dir"
  else
    ac_dir_suffix=
  fi

  case "$ac_top_srcdir" in
  .)  srcdir=. ;;
  /*) srcdir="$ac_top_srcdir$ac_dir_suffix" ;;
  *)
    # Relative path.  Prepend a "../" for each directory in $ac_dir_suffix.
changequote(,)dnl
    ac_dots=`echo $ac_dir_suffix|sed 's%/[^/]*%../%g'`
changequote([,])dnl
    srcdir="$ac_dots$ac_top_srcdir$ac_dir_suffix" ;;
  esac

  echo creating "$ac_file"
  rm -f "$ac_file"
  comment_str="Generated automatically from `echo $ac_file|sed 's|.*/||'`.in by configure."
  case "$ac_file" in
    *.c | *.h | *.C | *.cc | *.m )  echo "/* $comment_str */" > "$ac_file" ;;
    * )          echo "# $comment_str"     > "$ac_file" ;;
  esac
  sed -e "
$ac_prsub
$ac_vpsub
dnl Shell code in configure.in might set extrasub.
$extrasub
dnl Insert the sed substitutions.
undivert(1)dnl
" $ac_top_srcdir/${ac_file}.in >> $ac_file
fi; done
AC_OUTPUT_HEADER
$2
exit 0
EOF
chmod +x config.status
${CONFIG_SHELL-/bin/sh} config.status
])dnl
dnl This is a subroutine of AC_OUTPUT, broken out primarily to avoid bugs
dnl with long definitions in GNU m4 1.0.  This is called inside a quoted
dnl here document whose contents are going into config.status.
define(AC_OUTPUT_HEADER,[dnl
ifdef([AC_CONFIG_NAMES],[dnl
changequote(<<,>>)dnl

# These sed commands are put into ac_sed_defs when defining a macro.
# They are broken into pieces to make the sed script easier to manage.
# They are passed to sed as "A NAME B NAME C VALUE D", where NAME
# is the cpp macro being defined and VALUE is the value it is being given.
# Each defining turns into a single global substitution command.
# Hopefully no one uses "!" as a variable value.
# Other candidates for the sed separators, like , and @, do get used.
#
# ac_d sets the value in "#define NAME VALUE" lines.
ac_dA='s!^\([ 	]*\)#\([ 	]*define[ 	][ 	]*\)'
ac_dB='\([ 	][ 	]*\)[^ 	]*!\1#\2'
ac_dC='\3'
ac_dD='!g'
# ac_u turns "#undef NAME" with trailing blanks into "#define NAME VALUE".
ac_uA='s!^\([ 	]*\)#\([ 	]*\)undef\([ 	][ 	]*\)'
ac_uB='\([ 	]\)!\1#\2define\3'
ac_uC=' '
ac_uD='\4!g'
# ac_e turns "#undef NAME" without trailing blanks into "#define NAME VALUE".
ac_eA='s!^\([ 	]*\)#\([ 	]*\)undef\([ 	][ 	]*\)'
ac_eB='<<$>>!\1#\2define\3'
ac_eC=' '
ac_eD='!g'
changequote([,])dnl
rm -f conftest.sed
EOF
# Turn off quoting long enough to insert the sed commands.
rm -f conftest.sh
cat > conftest.sh <<EOF
$ac_sed_defs
EOF

# Break up $ac_sed_defs (now in conftest.sh) because some shells have a limit
# on the size of here documents.

# Maximum number of lines to put in a single here document.
ac_max_sh_lines=9

while :
do
  # wc gives bogus results for an empty file on some AIX systems.
  ac_lines=`grep -c . conftest.sh`
  if test -z "$ac_lines" || test "$ac_lines" -eq 0; then break; fi
  rm -f conftest.s1 conftest.s2
  sed ${ac_max_sh_lines}q conftest.sh > conftest.s1 # Like head -20.
  sed 1,${ac_max_sh_lines}d conftest.sh > conftest.s2 # Like tail +21.
  # Write a limited-size here document to append to conftest.sed.
  echo 'cat >> conftest.sed <<CONFEOF' >> config.status
  cat conftest.s1 >> config.status
  echo 'CONFEOF' >> config.status
  rm -f conftest.s1 conftest.sh
  mv conftest.s2 conftest.sh
done
rm -f conftest.sh

# Now back to your regularly scheduled config.status.
cat >> config.status <<\EOF
# This sed command replaces #undef's with comments.  This is necessary, for
# example, in the case of _POSIX_SOURCE, which is predefined and required
# on some systems where configure will not decide to define it in
[#] AC_CONFIG_NAMES.
cat >> conftest.sed <<\CONFEOF
changequote(,)dnl
s,^[ 	]*#[ 	]*undef[ 	][ 	]*[a-zA-Z_][a-zA-Z_0-9]*,/* & */,
changequote([,])dnl
CONFEOF
rm -f conftest.h
# Break up the sed commands because old seds have small limits.
ac_max_sed_lines=20

CONFIG_HEADERS=${CONFIG_HEADERS-"AC_CONFIG_NAMES"}
for ac_file in .. ${CONFIG_HEADERS}; do if test "x$ac_file" != x..; then
  echo creating $ac_file

  cp $ac_top_srcdir/$ac_file.in conftest.h1
  while :
  do
    ac_lines=`grep -c . conftest.sed`
    if test -z "$ac_lines" || test "$ac_lines" -eq 0; then break; fi
    rm -f conftest.s1 conftest.s2 conftest.h2
    sed ${ac_max_sed_lines}q conftest.sed > conftest.s1 # Like head -20.
    sed 1,${ac_max_sed_lines}d conftest.sed > conftest.s2 # Like tail +21.
    sed -f conftest.s1 < conftest.h1 > conftest.h2
    rm -f conftest.s1 conftest.h1 conftest.sed
    mv conftest.h2 conftest.h1
    mv conftest.s2 conftest.sed
  done
  rm -f conftest.sed conftest.h
  echo "/* $ac_file.  Generated automatically by configure.  */" > conftest.h
  cat conftest.h1 >> conftest.h
  rm -f conftest.h1
  if cmp -s $ac_file conftest.h 2>/dev/null; then
    # The file exists and we would not be changing it.
    echo "$ac_file is unchanged"
    rm -f conftest.h
  else
    rm -f $ac_file
    mv conftest.h $ac_file
  fi
fi; done

])])dnl